Patent GB-298555-A (GB)
Title: Improvements in vehicle snubbers and spring suspensions therefor
IPC: B60G11/38
Filed: 1928-04-30
Abstract: 298,555. Fageol, R. B. Oct. 11, 1927, [Convention date]. Laminated springs; resilient shackles; indiarubber springs; gaiters. - A shock absorber for laminar springs of vehicles comprises resilient means, such as indiarubber blocks, firmly pressed against a spring to cushion the deflections and relative longitudinal movements of the spring leaves. The shock absorbers may be embodied in spring shackles or in gaiters. In one form, an indiarubber block 18, Fig. 5, formed with a number of steps 19 - - 21 is clamped against the underside of the spring leaves 22 - - 24 near the end of the spring by a recessed base plate 15 and a U-bolt 27 with acorn nuts 30. The plate 15 has side flanges 27<1> enclosing the arms of the U-bolt. The base plate may be stepped so that the parts 19 - - 21 of the block are of equal thickness. When applied to a transverse spring, the shock-absorbers are clamped on the upper surface. For heavy vehicles, an auxiliary resilient pad 31, Fig. 8, is clamped on the flat surface of the spring by a recessed plate 32 and straight bolts 34. The parts of the block 18 may be separated by webs 36 on the base plate 15. In a shock-absorber embodied in a shackle, the spring hanger 44, Fig. 11, is used to clamp the indiarubber block 52 against the spring leaves, together with a U- bolt 55 with catillated nuts 56 and a recessed base plate 54, between which and a yoke 57 at the lower ends of the hanger arms an indiarubber pad 61 may be interposed. A pad 59 is also placed between the upper surface of the spring and the hanger bracket 46 secured to the chassis 41, and a pad 47 is placed between the bracket 46 and a clip seat 45 for the hanger. All the pads are received in recesses in their seats and may be provided with longitudinal slots to increase their resilience. A protuberance on the top leaf may engage the slot in the pad 59. The free end 51 of the top leaf is preferably turned down, and the end of each leaf may also be turned down between the stepped parts of the block 52. The pad 59 may be replaced by a hardened steel ball held between concave recesses on the upper surface of the spring and in a seat positioned in a recess in the underside of the bracket 46, swinging movement of the hanger 44 causing the ball to become wedged and thus increasing the pressure on the block and pads. When embodied in a gaiter, the stepped blocks 84, Fig. 17, forms the lower side and end of the body and is clamped against the spring by U-bolts 86 passing over the upper side 83 and secured by plates 87 and nuts 88. In another form, indiarubber blocks 89, 90, Fig. 19 are clamped against the side edges of the leaves 91 by recessed plates 92, 93 and a U-bolt 95. The Specification as open to inspection under Sect. 91 (3) (a) comprises also the following :-A resilient block 36', Fig. 11, (Cancelled), is clamped on the underside of a spring leaf by a clamp member 37 or the block may be resiliently clamped on the spring by using a helical spring. In a modification, a pendulum member 39, Fig. 13, is adapted to swing downwards on rebound to increase the compression of an indiarubber block 40 which may be positioned above or below the spring. This subject-matter does not appear in the Specification as accepted.